这家超市通过低价策略，以比竞争对手便宜10%的价格出售同样的商品。

The supermarket ___undercuts its competitors by selling the same products at 10% lower prices.

持续的负面消息正在逐渐削弱公众对经济的信心。

The constant negative news is ___undercutting public confidence in the economy.

木匠在桌腿下方削掉一些木头以便更好地固定。

The carpenter ___undercut the table leg to secure it better.